package com.lanou.musicproject.tools;

/**
 * Created by quyan on 15/10/7.
 */

    import android.content.Context;
    import android.graphics.Bitmap;
    import android.graphics.Bitmap.Config;
    import android.graphics.Canvas;
    import android.graphics.Paint;
    import android.graphics.RectF;
    import android.graphics.PorterDuff.Mode;
    import android.graphics.PorterDuffXfermode;
    import android.graphics.Rect;
    import android.graphics.drawable.BitmapDrawable;
    import android.graphics.drawable.Drawable;
    import android.util.AttributeSet;
    import android.widget.ImageView;

    /**
     * 自定义的圆角矩形ImageView，可以直接当组件在布局中使用。
     * @author caizhiming
     *
     */
    public class ImageUtils extends ImageView{

        private Paint paint;

        public ImageUtils(Context context) {
            this(context,null);
        }

        public ImageUtils(Context context, AttributeSet attrs) {
            this(context, attrs,0);
        }

        public ImageUtils(Context context, AttributeSet attrs, int defStyle) {
            super(context, attrs, defStyle);
            paint  = new Paint();
        }

        /**
         * 绘制圆角矩形图片
         * @author caizhiming
         */
        @Override
        protected void onDraw(Canvas canvas) {

            Drawable drawable = getDrawable();
            if (null != drawable) {
                Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
                Bitmap b = getRoundBitmap(bitmap, 20);
                final Rect rectSrc = new Rect(0, 0, b.getWidth(), b.getHeight());
                final Rect rectDest = new Rect(0,0,getWidth(),getHeight());
                paint.reset();
                canvas.drawBitmap(b, rectSrc, rectDest, paint);

            } else {
                super.onDraw(canvas);
            }
        }

        /**
         * 获取圆角矩形图片方法
         * @param bitmap
         * @param roundPx,一般设置成14
         * @return Bitmap
         * @author caizhiming
         */
        private Bitmap getRoundBitmap(Bitmap bitmap, int roundPx) {
            Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),
                    bitmap.getHeight(), Config.ARGB_8888);
            Canvas canvas = new Canvas(output);

            final int color = 0xff424242;

            final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
            final RectF rectF = new RectF(rect);
            paint.setAntiAlias(true);
            canvas.drawARGB(0, 0, 0, 0);
            paint.setColor(color);
            int x = bitmap.getWidth();

            canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
            paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
            canvas.drawBitmap(bitmap, rect, rect, paint);
            return output;


        }
    }

